Home / 6,890.10-9,507.70-3,906.20

Finding the Fourth Proportional to 6,890.10, 9,507.70 and 3,906.20

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Solution

The fourth proportional to 6,890.10, 9,507.70 and 3,906.20 is: 5,390.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,890.10 : 9,507.70 = 3,906.20 : x
  2. Step 2: Convert to fraction form
    6,890.10/9,507.70 = 3,906.20/x
  3. Step 3: Cross multiply
    6,890.10x = 9,507.70 × 3,906.20
  4. Step 4: Simplify right side
    6,890.10x = 37,138,977.74
  5. Step 5: Solve for x
    x = 37,138,977.74/6,890.10
  6. Step 6: Final answer
    x = 5,390.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.